Original heating trade vintage catalog for LOUVER MANUFACTURING COMPANY. Main office was located at 3601 Wooddale Ave, Minneapolis, MN. Manufacturers of adjustable and fixed aluminum ventilators. Vari-pitch louver adds to the beauty of the house because they perfectly conform to the pitch of the roof line. Lo Man Co sectional has 5 combinations. Unbound from a large 1958 architectural catalog, this unique old eight page technical specifications brochure would display beautifully matted and framed. Nice cover graphics. A wonderful addition to your retro ventilation equipment library. Pages are detached and contain a small amount of residual glue on edge.